# 950386 Lock Nut | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta lock nut supplied only within 850673, weighing 0.014 kg and listed for 147 applications across the MD, AQ, TMD, AD, AQAD and D series.

## 🚤 Compatibility

-   **Engine Family:** MD, AQ, TMD, AD, AQAD, D, BB, TAMD, MS, B, AQD, MB

Full model list at the end of this description.

## ⚙️ Key Features

-   Only included in 850673
-   0.014 kg
-   147 applications across six series

## 🔌 Function

Threads onto a stud or bolt and resists backing off under vibration, holding the joint's clamping load.

## ⚠️ Common Signs of Failure

-   Nut spins on freely with no drag at all
-   Fastener found loose or backed off in service
-   Thread damaged, stretched or picked up
-   Locking section flattened or polished by earlier reuse

## 🛠️ Service Notes

-   This nut is listed only as part of 850673 — check whether the assembly is the correct order rather than the nut on its own
-   Lock nut 950356 shares the same 0.014 kg weight, so weight is no guide between the two

## 📦 Condition

-   Genuine Volvo Penta part
-   Brand new
-   Supplied in original or equivalent packaging

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta 2003, 2003R, 2003R SOLAS, 100S, 110S, 120S-B, 740A, 2003TB, 2003TB SOLAS, 230A, 230B, 250A, 250B, 251A, 120SC, 2001AG, 2001B, 2001BG, 2001D, 2003D, 2003T, 2003TR, 2002AG, 2002B, 2002BG, 2002D, 2003B, 2003B SOLAS, 2003 SOLAS, 2001, 2002, 2001R
-   Volvo Penta AD41P-B, AD41B, AD41, AD41A, AD41BJ
-   Volvo Penta B230, B230E, B230F, B230FB, B230FX
-   Volvo Penta AQ130C, AQ130D, AQ130A, AQ130B
-   Volvo Penta AQ131A, AQ131B, AQ131C, AQ131D
-   Volvo Penta AQ151A, AQ151B, AQ151C
-   Volvo Penta AQ170B, AQ170C, AQ170A
-   Volvo Penta AQ200D, AQ200C, AQ200B
-   Volvo Penta AQ225D, AQ225B, AQ225C
-   Volvo Penta BB115A, BB115B, BB115C
-   Volvo Penta BB170B, BB170C, BB170A
-   Volvo Penta MB20A, MB20B, MB20C
-   Volvo Penta MD5A, MD5B, MD5C
-   Volvo Penta MS2B-A, MS2B, MS2V
-   Volvo Penta TAMD41B, TAMD41M-A, TAMD41A
-   Volvo Penta TMD40A, TMD40B, TMD40C
-   Volvo Penta AD31, AD31B
-   Volvo Penta AQ115A, AQ115B
-   Volvo Penta AQ125B, AQ125A
-   Volvo Penta AQ145B, AQ145A
-   Volvo Penta AQ171A, AQ171C
-   Volvo Penta AQAD40B, AQAD40A
-   Volvo Penta AQD21A, AQD21B
-   Volvo Penta D41, D41B
-   Volvo Penta MD11C, MD11D
-   Volvo Penta MD17C, MD17D
-   Volvo Penta MD21B, MD21A
-   Volvo Penta MD6A, MD6B
-   Volvo Penta MD7B, MD7A
-   Volvo Penta TAMD31A, TAMD31B
-   Volvo Penta TAMD40A, TAMD40B
-   Volvo Penta TMD31A, TMD31B
-   Volvo Penta TMD41A, TMD41B
-   Volvo Penta AD30A
-   Volvo Penta AD40B
-   Volvo Penta AQ120B
-   Volvo Penta AQ140A
-   Volvo Penta AQ165A
-   Volvo Penta AQ175A
-   Volvo Penta AQ190A
-   Volvo Penta AQ240A
-   Volvo Penta AQ255A
-   Volvo Penta AQ260A
-   Volvo Penta AQ290A
-   Volvo Penta AQAD30A
-   Volvo Penta AQD2B
-   Volvo Penta AQD40A
-   Volvo Penta B20
-   Volvo Penta BB140A
-   Volvo Penta BB145A
-   Volvo Penta BB165A
-   Volvo Penta BB740A
-   Volvo Penta D2002AG
-   Volvo Penta D2003AG
-   Volvo Penta MD1B
-   Volvo Penta MD2B
-   Volvo Penta MD3B
-   Volvo Penta MD30A
-   Volvo Penta MD31A
-   Volvo Penta MD40A
-   Volvo Penta MD67C
-   Volvo Penta TAMD30A
-   Volvo Penta TMD30A

## Details

- **Price:** 3.55 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3.55 AUD | In stock |

## Images

- 950386 Lock Nut | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/950386-lock-nut-genuine-volvo-penta)
> Updated: 2026-09-21